Impeoved appaeattjs foe impregnating wood with tae and other materials



G. PUSTKUOHEN. I APPARATUS FOR IMPREGNATING WOOD WITH TAB AND OTHER MATERIAL.

No. 64,703. Patented May 14, 1867.

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GEORGE PUSTKUGHEN, OF HOBOKEN, NEW JERSEY.

-Lette78 Patent No. 64,703, as May 14, 1867.-

IMPROVED APPARATUS FOR IMPREGNATING WOOD WITH TAB. AND OTHER MATERIALS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, GEORGE PUsTKUcHEN, of Hoboken, Hudson county, New Jersey, have invented a new and improved Apparatus for Impregnating Wood; and I do hereby declarethat the following is a full, clear,

and exact description thereof, which will enable others skilled in the art to make and use the same, reference I being bad to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a vertical longitudinal section of my improved apparatus. Figure 2 is a vertical cross-section of the same. Similar letters of reference indicate corresponding parts.

This invention relates to a machine-in which railroad ties and sleepers, and any other kind of wood, can he dried'and saturated with tar or any other suitable substance which will prevent the decaying of the wood. The invention consists in the arrangement and construction of a boiler, and of a sheet-metal cylinder, into which the wood is placed. The annular boiler surrounds the cylinder, and is placed upon a furnace. The steam created in the boiler is used to drive an air-pump, whereby a' vacuum is created in the drying-cylinder, and the pores of the wood are opened to receive the substancej with which they are to be filled. When the vacuum in the dryingcylinder is complete as it can practically be made the operation of the pump is stopped, and the tar or other impregnating substdnce is then let into the cylinder. It will not require the use of a press to force the tar or other substance into the, pores of the wood, as the vacuum created therein will be sufficient to draw the said substance into the wood and to completely saturatethe latter'therewith.

' represents a foundation, built of brick or other suitable material, npon'which a cylindrical steam boiler,

B, is arranged. The latter is made of sheet iron or other suitable material, and within it is arranged a cylinder v C, also made of sheet in tal or other suitable material. The ends of the cylinder 0 project beyond'those of the boiler 13, as shown, for the purpose of facilitating the arrangement of thepipes for introducing the composition and for removing the air and waste material from the said cylinder. The boiler B becomes an annular vessel by the introduction of the cylinder 0, as is clearly shown in fig. 2. A furnace, D, is arranged in the foundation A, the smoke of which is carried ofi' in a chimney, E. One head, F, of the cylinder C is hinged, or otherwise atached, so that that end of the cylinder can beopened for the purpose of introducing or removing the wood. After the latter has been placed into the cylinder O, the cover F is firmly secured, by means of bolts and screws, or other devices, and, suitable elastic washers areused, so that the cover may close air-tight. The fire in the furnace D being started, the water in theboiler is heated, and also the air in the cylinder C; thus the moisture will be removed from thewood, as well as all those portions which may afterwards havea tendency to accelerate its decay. As soon as the moisture is sufiiciently removed, or, rather, as soon as the air in the cylinder is dry,

enough, an air-pump, G, that is secured to the cylinder, and is operated by a small steam engine, H, which is shown by red lines in fig. 1, is set in motion, and a vacuum is created in the cylinder 0, whereby the pores in the wood are opened. When the vacuum is as complete as possible the pump is stopped, and a valve, a, which is secured in a pipe, 6, that connects the cylinder C with the vessel I, containing the molten tar or other material, is opened, and the tar will then rush into the cylinder and saturate the wood completely. By creating the vacuum in the cylinder I am enabled to do away with the powerful presses heretofore used for'forcing the preserving materiul into the wood. After the wood has been thoroughly saturated it may be-removed from the cylinder by opening the door F. The superfluous tar or other material can be drawn off through pipe, 0, and is returned into the vessel I. p I I claim as new, and desire to secureby Letters Patent- 1. An apparatus for impregnating wood, that is made and operating substantially as herein shown and described. I

2. The application of an air-pump, for the purpose of impregnating wood, when combined with the cylinder C and boiler B, substantially as and for the purpose herein shown and described. I

GEORGE PUSTKUCHEN. Witnesses:

WM. F. MCNAMARA, ALEX. F. Ronsnrs. 

